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Minima in Diffraction

A single slit...

Question

A single slit illuminated by red light Of 6000 A° wavelength gives first order fraunhofer diffraction minima that aubtends angle of 4° with the axis calculate the slit width

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Q. What will be the angle of diffraction for the first order maximum due to Fraunhofer diffraction by a single slit of width

0.50 m m

, using light of wavelength

500 n m

?

Q. In a Fraunhofer diffraction experiment, a single slit of width

0.5 m m

is illuminated by a monochromatic light of wavelength

600 n m

. The diffraction pattern is observed on a screen at a distance of

50 c m

from the slit. What will be the linear separation of the first order minima?

Q. The angular width of central maxima in the Fraunhofer diffraction pattern is measured. The slit is illuminated by the light of wavelength

6000 ˚ A

If the slit is illuminated by a light of another wavelength, angular width decreases by 30%. The wavelength of light used is :

Q. In a single slit diffraction experiment, a slit of width is illuminated by the Red light of wavelength

650 n m

. For what value of

a

will the first minimum fall at an angle of diffraction of

30^{o}

Q. In diffraction using single slit, a slit of width a is illuminated by white light. For red light

(λ = 6500 \circ A)

, the first minima is obtained for

θ = 30^{\circ}

. Then the value of a will be:

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